1963 Chevy Ii Station Wagon Tune Up Hei Cap
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With the HEI cap removed, the mechanical advance mechanism was exposed to see if Mena could modify it. An ignition advance mechanism adds some timing at low speeds and then “bleeds” it off as you get closer to wide-open throttle. Since this is a true vacuum advance and not a mechanical one, he was forced to simply hook up the vacuum line to see if that improved the wagon’s drive characteristics. View Related Article
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